The invention provides a first hollow section (1) and a second hollow section (2) which can be easy to manufacture and reliably bonded. The second hollow section (2) is surrounded by the first hollow section (1) in a lap joint area. In the lap joint area, a core (3) connected with the first hollow section (1) is disposed in the first hollow section (1) and the second hollow section (2), inflatable structural adhesive is arranged between the core (3) and the inner surface of the second hollow section (2). The invention further relates to a bonding method for forming the bonding connection..